A report by the Pew Research Center, conducted in partnership with the MacArthur Foundation Research Network on an Aging Society, finds the share of older Americans who live alone has fallen 3% since 1990, largely because women ages 65 to 84 are increasingly likely to live with their spouse or their children. The report attributes this trend to an increase in life expectancy, especially among men, which has made it more likely that older women would be living with their spouses rather than as widows.